Ann Walton Kroenke is the quiet half of a billionaire power couple. Her husband Stan owns and is more closely affiliated with their highly visible sports franchises, including the NBA's Denver Nuggets, the NHL's Colorado Avalanche, the NFL's St. Louis Rams and the Premier League soccer club Arsenal. Ann also inherited, along with her sister Nancy, a portion of their father James "Bud" Walton's Wal-Mart

fortune. Bud cofounded the retail giant with his older brother Sam in the 1960s and when he died in 1995 he left each of his daughters enough Wal-Mart shares to make them billionaires. Wal-Mart has grown into a $476 billion (sales) global enterprise with more than 11,000 stores worldwide. Ann's stake is worth more than $4 billion.

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